Skip--Only use it on the as cast surfaces. What you're trying to seal in is
the casting core sand particles, sand grit from the foundry final cleanup
process that involves the uses of abrasive grinders as well as tramp rust,
scale and dirt in corners and pores. I would not attempt to use it on any
machined surfaces especially where the surface can't be roughened to provide
a good grip for the coating. Don't attempt to put it in any drilled holes.
You'll likely restrict the flow rather than improving it. If you're
marginal with oil feed holes drill them larger or at least chamfer the edges
at the openings (Which will likely help your own feelings more than the flow
losses of the oil)
I remain unconvinced that any improvement on the surface finish of oil
passageways will have any measurable effect on flow rate. Virtually all oil
flow is in the regime of laminar flow where surface roughness is not a
factor. The classic engineering pipe friction curves for friction factor at
various Reynolds numbers shows this. It's a whole different issue for thin
liquids like water, gasoline and alcohol. In the size lines we use the flow
is turbulent and pipe roughness counts. But nowhere near as much as the
actual area of the pipe flow path (the diameter in most cases).
Ed Weldon
----- Original Message -----
From: "Higginbotham Land Speed Racing" <saltrat@LubricationDynamics.com>
To: "Ed Weldon" <23.weldon@comcast.net>; <land-speed@autox.team.net>
Sent: Wednesday, October 18, 2006 10:01 AM
Subject: Re: Internal Engine Block Painting
> Ed,
> So if I interpret your comments correctly, I would increase the
> efficiency of the entire oil system if I used Glyptol on the internal
> passages of the pump(s) and oil passages too?
> Skip
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